These then are Spinoza’s general forms, this is his principal idea. Some further determinations have still to be mentioned. He gives definitions of the terms modes, understanding, will, and of the affections, such as joy and sadness.[199] We further find consciousness taken into consideration. Its development is extremely simple, or rather it is not developed at all; Spinoza begins directly with mind. “The essence of man consists of certain modifications of the attributes of God”; these modifications are only something related to our understanding. “If we, therefore, say that the human mind perceives this or that, it means nothing else than that God has this or that idea, not in so far as He is infinite, but in so far as He is expressed by the idea of the human mind. And if we say that God has this or that idea, not in so far as He constitutes the idea of the human mind, but in so far as He has, along with the human mind, the idea of another thing, then we say that the human mind perceives the thing partially or inadequately.” Truth is for Spinoza, on the other hand, the adequate.[200] The idea that all particular content is only a modification of God is ridiculed by Bayle,[201] who argues from it that God modified as Turks and Austrians, is waging war with Himself; but Bayle has not a trace of the speculative element in him, although he is acute enough as a dialectician, and has contributed to the intelligent discussion of definite subjects. The relation of thought and extension in the human consciousness is dealt with by Spinoza as follows: “What has a place in the object” (or rather in the objective) “of the idea which constitutes the human mind must be perceived by the human mind; or there must necessarily be in the mind an idea of this object. The object of the idea which constitutes the human mind is body, or a certain mode of extension. If, then, the object of the idea which constitutes the human mind, is the body, there can happen nothing in the body which is not perceived by the mind. Otherwise the ideas of the affections of the body would not be in God, in so far as He constitutes our mind, but the idea of another thing: that is to say, the ideas of the affections of our body would not be likewise in our mind.” What is perplexing to understand in Spinoza’s system is, on the one hand, the absolute identity of thought and Being, and, on the other hand, their absolute indifference to one another, because each of them is a manifestation of the whole essence of God. The unity of the body and consciousness is, according to Spinoza, this, that the individual is a mode of the absolute substance, which, as consciousness, is the representation of the manner in which the body is affected by external things; all that is in consciousness is also in extension, and conversely. “Mind knows itself only in so far as it perceives the ideas of the affections of body,” it has only the idea of the affections of its